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The REF TEK 131A series accelerometers offer a powerful combination of low noise and excellent stability for monitoring of ground or structure monitoring.
The 131A-01/1. Because no coils or magnets are used, the accelerometer is inherently stable over a wide temperature range with excellent stability, linearity, hysteresis and noise levels
The 131A-02BH is a triaxial Borehole accelerometer housed in a 3 inch dia case
The 131A-02/3 Low noise accelerometer provides dynamic range useful with 24 bit digitisers like the REF TEK 130 series, these accelerometers use a micro-electromechanical system (MEMS) for the variable capacitance displacement sensor. The standard model is +/-3.5g full scale with 200ng²/Hz noise level. Housing is anodised aluminium, sealed to IP67
Seismic Applications:
Free Field Reference
Building arrays
Structural Monitoring
Aftershock studies
Features:
Sate of the art force Balance Accelerometer
Low Noise
Sensitivity and offset stable over wide temperature range
Available in triaxial, uniaxial an borehole versions
Generic Specifications
| Sensor Type | Force Balance Accelerometer, triaxial |
| Noise | 200ng²/Hz |
| Frequency Response | DC-400 Hz |
| Output Impedance | ~200 Ohm (nominal) |
| Full scale range | ±3.5g standard |
| Linearity | 0.05% of full scale |
| Operating Temperature | -20°C to 60°C |
| Housing | Stainless Steel for borehole version, anodised aluminium for others |
| Hysteresis | 0.005% of full scale |
| Power | 10 to 16VDC |
